package targetToOffer.fifthDay;


/**
 * @author Godc
 * @description
 */
public class MirrorTree {
}
class Solution {
    public TreeNode mirrorTree(TreeNode root) {
        if(root==null) return null;
        TreeNode temp = root.left;
        root.left = root.right;
        root.right = temp;
        mirrorTree(root.left);
        mirrorTree(root.right);
        return root;
    }
}
